Reading comprehension Worksheets

40,284 type resources
Grade 8 Science Conservation In Systems Worksheet with Short Notes

Grade 8 Science Conservation In Systems Worksheet with Short Notes

Meadowlark WorksheetsCreated byMeadowlark Worksheets

Learning Objectives

  • Understand the concept of energy conservation within a system and its surroundings.
  • Describe how energy transfers occur during mechanical and thermal processes.
  • Predict energy behavior in systems like roller coasters based on energy conservation principles.

Grade 8Science7 Pages

Also included in: Grade 8 Matter and Chemical Reactions Science lesson bundle +1 more

$3.00

Instant download

Integrated Reconstruction Assessment | BC Standards Grade 12 Science

Integrated Reconstruction Assessment | BC Standards Grade 12 Science

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Understand the various evidence types used in integrated geological reconstruction.
  • Analyze how stratigraphy, radiometric data, paleomagnetic records, structural relationships, and fossils are synthesized to interpret Earth's history.
  • Evaluate the significance of multiple evidence correlation in constraining tectonic and paleoenvironments.
$5.00

Instant download

Health Goal Setting Worksheet Grade 11 | NHES Action Plan Activities

Health Goal Setting Worksheet Grade 11 | NHES Action Plan Activities

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain why health goals should be realistic and measurable.
  • Write clear health goals using specific outcomes and time frames.
  • Identify ways to track progress and adjust goals when barriers appear.

Grade 11Health30 Pages

$5.00

Instant download

Grade 8 Science | Motors and Generators Worksheet (Alberta Standards) (PDF)

Grade 8 Science | Motors and Generators Worksheet (Alberta Standards) (PDF)

Evergreen Desk EducationCreated byEvergreen Desk Education

Learning Objectives

  • Explain how electric motors convert electrical energy into mechanical motion using magnetic fields and current-carrying conductors.
  • Explain how generators convert mechanical motion into electrical energy using electromagnetic induction.
  • Describe how design parameters (coil turns and magnetic flux) affect motor/generator output and efficiency.

Grade 8Science16 Pages

$4.00

Instant download

Grade 8 Health Skill Development Worksheet (Ontario) | Practice & Reflection

Grade 8 Health Skill Development Worksheet (Ontario) | Practice & Reflection

Sunny Desk ResourcesCreated bySunny Desk Resources

Learning Objectives

  • Explain how skill development is assessed using control, consistency, and efficiency criteria.
  • Identify areas for improvement by comparing current performance to previous attempts.
  • Set measurable movement goals and describe how regular practice supports progress over perfection.

Grade 8Health16 Pages

Also included in: Grade 8 Movement Competence Health Lesson Bundle: Ontario Framework +1 more

$4.00

Instant download

Grade 8 Science Water Quality Indicators Worksheet (Ontario) – PDF

Grade 8 Science Water Quality Indicators Worksheet (Ontario) – PDF

Bright Mind ResourcesCreated byBright Mind Resources

Learning Objectives

  • Identify physical, chemical, and biological water quality indicators.
  • Interpret indicator ranges for aquatic health and uses.
  • Understand sources of variability and limitations in water assessment.

Grade 8Science

$3.00

Instant download

Contaminant Dynamics Science Worksheet | Ontario Grade 11 Assessment

Contaminant Dynamics Science Worksheet | Ontario Grade 11 Assessment

Coral Reef LearningCreated byCoral Reef Learning

Learning Objectives

  • Understand the pathways and fate of physical and chemical contaminants in ecosystems.
  • Identify point and nonpoint sources of contaminants and their transport mechanisms.
  • Explain processes like bioaccumulation and biomagnification and their effects on food-web integrity.

Grade 11Science

$2.00

Instant download

Cloud and Precipitation Worksheet | Grade 6 Weather Science Activity

Cloud and Precipitation Worksheet | Grade 6 Weather Science Activity

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain how clouds form from cooling water vapor and condensation on tiny particles
  • Describe how precipitation forms when droplets or ice crystals become heavy enough to fall
  • Compare precipitation types (rain, snow, sleet, hail) based on temperature and atmospheric conditions
$5.00

Instant download

Grade 8 Advanced Search Strategies Worksheet | Computer Science Activity

Grade 8 Advanced Search Strategies Worksheet | Computer Science Activity

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Use keywords and quotation marks to form more precise search queries.
  • Apply common search operators and filters to narrow results and improve relevance.
  • Explain how query structure affects search results.

Grade 8Computer Science30 Pages

Also included in: Grade 8 Internet & Networking Lesson Bundle | Computer Science (General)

$5.00

Instant download

Grade 9 ELA | Evidence Integration Worksheet | Alberta Standards

Grade 9 ELA | Evidence Integration Worksheet | Alberta Standards

Lumora LearningCreated byLumora Learning

Learning Objectives

  • Explain how integrating evidence strengthens a claim through clear reasoning and interpretation.
  • Identify the difference between evidence (data/quotes/paraphrases) and explanation (meaning and significance).
  • Choose evidence that matches the specific point being made and integrate it with transitions.

Grade 9ELA12 Pages

$3.00

Instant download

Grade 11 Science | Boundary Types in Plate Tectonics - Reading Comprehension

Grade 11 Science | Boundary Types in Plate Tectonics - Reading Comprehension

Coral Reef LearningCreated byCoral Reef Learning

Learning Objectives

  • Identify the different types of plate boundaries
  • Describe the landforms and seismic activity associated with each boundary
  • Explain how divergent boundaries create new crust

Grade 11Science45 Pages

$5.00

Instant download

Grade 9 Social Studies – Migration Drivers Worksheet (Ontario Standard) (PDF)

Grade 9 Social Studies – Migration Drivers Worksheet (Ontario Standard) (PDF)

Sunny Desk ResourcesCreated bySunny Desk Resources

Learning Objectives

  • Explain how economic opportunity, conflict, and environmental change can drive migration
  • Describe consequences of migration and urbanization, including metropolitan sprawl, rural decline, and housing pressure
  • Analyze how migration flows and policy decisions interact with labour markets and social services

Grade 9Social Studies16 Pages

Also included in: Grade 9 Population Demographic Trends Social Studies Lesson Bundle | Ontario +1 more

$4.00

Instant download

Human Water Disruptions Assessment | California Standards Grade 6 Science

Human Water Disruptions Assessment | California Standards Grade 6 Science

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain how dams, withdrawals, and land-use changes can alter the timing and pathways of the water cycle
  • Describe how changes in water flow can affect sediment transport and aquatic habitats
  • Identify ways human pollution and habitat changes can impact water quality and living organisms
$5.00

Instant download

Grade 6 Science | Chromatography - Daily Reading Comprehension Practice

Grade 6 Science | Chromatography - Daily Reading Comprehension Practice

Coral Reef LearningCreated byCoral Reef Learning

Learning Objectives

  • Explain the basic concept of chromatography and how it separates mixtures.
  • Identify the roles of mobile and stationary phases in chromatography.
  • Describe how solubility affects the movement of substances during chromatography.

Grade 6Science46 Pages

$5.00

Instant download

Multi-Factor Authentication MFA Cybersecurity Worksheet Grade 9

Multi-Factor Authentication MFA Cybersecurity Worksheet Grade 9

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Define authentication, verification, and factor and explain how they relate to security.
  • Compare single-factor login to multi-factor authentication and describe why MFA improves protection.
  • Identify correct and incorrect statements about MFA using real-world examples.
$5.00

Instant download

Grade 6 Social Studies — Eastern Mediterranean Geography Worksheet MCQ

Grade 6 Social Studies — Eastern Mediterranean Geography Worksheet MCQ

The Resource HubCreated byThe Resource Hub

Learning Objectives

  • Understand the key geographical features of the eastern Mediterranean region.
  • Analyze how mountains, rivers, and deserts influenced ancient settlement patterns.
  • Identify the significance of fertile areas like coastal plains for ancient Israelite communities.

Grade 6Social Studies9 Pages

Also included in: Grade 6 Ancient Israel & Judaism Social Studies Lesson Bundle California +1 more

$3.00

Instant download

Grade 7 ELA | Tone and Perspective Worksheet Elena | Alberta Assessment

Grade 7 ELA | Tone and Perspective Worksheet Elena | Alberta Assessment

Lumora LearningCreated byLumora Learning

Learning Objectives

  • Explain how tone is created through diction, sentence rhythm, and figurative language.
  • Analyze how point of view (perspective) affects credibility and the emphasis of information.
  • Compare two passages on the same topic to determine how wording and framing change intended meaning.
$3.00

Instant download

Advanced Search Strategies Worksheet Grade 7 Computer Science

Advanced Search Strategies Worksheet Grade 7 Computer Science

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Use keyword choices and search operators to make online queries more targeted.
  • Evaluate search results for relevance and credibility before using information.
  • Compare broad and focused searches to improve the quality of findings.

Grade 7Computer Science30 Pages

$5.00

Instant download

Grade 8 Science | Force Balance Worksheet (Alberta) PDF

Grade 8 Science | Force Balance Worksheet (Alberta) PDF

Evergreen Desk EducationCreated byEvergreen Desk Education

Learning Objectives

  • Explain the difference between balanced and unbalanced forces using net force and resulting motion
  • Use force vector ideas to predict whether an object stays at rest, stays moving at constant speed, or accelerates
  • Apply equilibrium concepts to real-life examples such as suspension bridges, supported pipelines, and parked vehicles

Grade 8Science15 Pages

$4.00

Instant download

Heredity And Variation Worksheet | Grade 8 Science Practice

Heredity And Variation Worksheet | Grade 8 Science Practice

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain how genetic information is passed from parents to offspring and why this leads to variation
  • Describe how recombination and changes in genetic material create differences among individuals
  • Use evidence from families and populations to support claims about inherited variation

Grade 8Science32 Pages

$5.00

Instant download

Grade 7 Science | Solution Concentration Reading Worksheet & Answer Key (PDF)

Grade 7 Science | Solution Concentration Reading Worksheet & Answer Key (PDF)

JCreated byJ.S Sheets

Learning Objectives

  • Understand how solution concentration quantifies solute relative to solvent.
  • Identify common measures of concentration such as mass percent and grams per litre.
  • Recognize how concentration affects physical properties like boiling point and freezing point.
$3.00

Instant download

Grade 3 ELA Note Guided Reporting Worksheet | Common Core Standards (PDF)

Grade 3 ELA Note Guided Reporting Worksheet | Common Core Standards (PDF)

Golden Apple StudioCreated byGolden Apple Studio

Learning Objectives

  • Use notes to choose relevant facts and details for a focused report on a topic
  • Write complete sentences that match the purpose and situation for speaking
  • Use transitions and clear phrasing to organize ideas in a report

Grade 3ELA15 Pages

Also included in: Questioning & Main Ideas in Grade 3 ELA Lesson Bundle | CCSS +1 more

$4.00

Instant download

Grade 9 Social Studies — Worksheet MCQ Paper for Enlightenment Ideas

Grade 9 Social Studies — Worksheet MCQ Paper for Enlightenment Ideas

The Resource HubCreated byThe Resource Hub

Learning Objectives

  • Explain key Enlightenment ideals such as reason, liberty, and progress
  • Describe how Enlightenment thinkers like Locke and Voltaire influenced political ideas
  • Evaluate how Enlightenment concepts shaped revolutions and modern political institutions
$3.00

Instant download

6th Grade Science | Energy Forms Worksheet (PDF) Aligned to TEKS

6th Grade Science | Energy Forms Worksheet (PDF) Aligned to TEKS

Evergreen Desk EducationCreated byEvergreen Desk Education

Learning Objectives

  • Identify and describe five common forms of energy: kinetic, potential, thermal, chemical, and electrical.
  • Connect each energy form to familiar everyday examples such as a rolling ball, a raised weight, warm objects, and batteries.
  • Distinguish among energy forms using key descriptive features (motion, position, molecular activity, and electric charges).

Grade 6Science16 Pages

$4.00

Instant download

Grade 11 Science — Worksheet MCQ Paper for Mastering Evidence Argumentation

Grade 11 Science — Worksheet MCQ Paper for Mastering Evidence Argumentation

The Resource HubCreated byThe Resource Hub

Learning Objectives

  • Understand the structure of scientific arguments connecting claims, evidence, and reasoning.
  • Identify methods for articulating assumptions and qualifying claims with confidence statements.
  • Evaluate multiple lines of evidence in scientific case studies such as climate trends and reaction kinetics.

Grade 11Science8 Pages

Also included in: Grade 11 Science AP Bundle: Mastering Key Concepts with MCQ Practice +1 more

$3.00

Instant download

Acid Base Reactions Worksheet | Grade 12 Science Practice

Acid Base Reactions Worksheet | Grade 12 Science Practice

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Compare the Arrhenius, Brønsted–Lowry, and Lewis definitions of acids and bases using correct examples.
  • Use conjugate acid–base pairs to explain changes in pH and relate pH to pOH.
  • Interpret titration curves and equivalence points and connect them to reaction stoichiometry and equilibria.
$5.00

Instant download

Grade 4 ELA | Figurative Meanings Worksheet with Short Notes (Printable PDF)

Grade 4 ELA | Figurative Meanings Worksheet with Short Notes (Printable PDF)

Meadowlark WorksheetsCreated byMeadowlark Worksheets

Learning Objectives

  • Identify similes and metaphors in a passage and explain what they suggest beyond the literal meaning.
  • Recognize personification and hyperbole and describe how each affects the mood or imagery.
  • Infer the author’s intended meaning by connecting figurative language to nearby events and details.
$3.00

Instant download

Grade 9 Science | Understanding Gravity & Orbits - Daily Reading Comprehension

Grade 9 Science | Understanding Gravity & Orbits - Daily Reading Comprehension

Coral Reef LearningCreated byCoral Reef Learning

Learning Objectives

  • Explain how gravity influences the motion of objects in space
  • Describe the relationship between mass, distance, and orbital speed
  • Identify examples of gravitational effects in our solar system

Grade 9Science44 Pages

$5.00

Instant download

Grade 11 Science | Energy Sustainability Choices - Daily Reading Comprehension

Grade 11 Science | Energy Sustainability Choices - Daily Reading Comprehension

Coral Reef LearningCreated byCoral Reef Learning

Learning Objectives

  • Identify renewable and non-renewable energy sources.
  • Understand the environmental impacts of different energy sources.
  • Analyze how various energy technologies contribute to sustainability.

Grade 11Science46 Pages

$5.00

Instant download

Earth Systems Worksheet | Grade 12 Science Practice TEKS Standards

Earth Systems Worksheet | Grade 12 Science Practice TEKS Standards

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain how energy transfer and matter cycling connect the atmosphere, hydrosphere, lithosphere, and cryosphere.
  • Interpret radiative balance and albedo effects to predict how changes in Earth’s surface alter climate.
  • Analyze hydrologic cycle processes and ocean–atmosphere coupling as mechanisms that drive climate variability and steady states.

Grade 12Science32 Pages

Also included in: Grade 12 Earth & Space Science Lesson Bundle: TEKS Framework

$5.00

Instant download

Grade 9 Science | Center Stability Worksheet with Short Notes (Printable PDF)

Grade 9 Science | Center Stability Worksheet with Short Notes (Printable PDF)

Meadowlark WorksheetsCreated byMeadowlark Worksheets

Learning Objectives

  • Understand the concept of center of mass and its calculation for complex systems.
  • Analyze torque and its role in maintaining static equilibrium in rigid bodies.
  • Identify factors contributing to the rotational stability of structures and objects.
$3.00

Instant download

Grade 11 Social Studies Rights And Outcomes Worksheet (Ontario PDF)

Grade 11 Social Studies Rights And Outcomes Worksheet (Ontario PDF)

Sunny Desk ResourcesCreated bySunny Desk Resources

Learning Objectives

  • Analyze how Charter protections and statutory duties shape legal outcomes and civic responsibilities.
  • Explain how rights limitations are justified by balancing interests and public policy.
  • Compare continuity and change in Canadian rights jurisprudence, including principles from Sparrow and effects on communities.

Grade 11Social Studies16 Pages

Also included in: Grade 11 Rights & Administrative Law Social Studies lesson bundle: Ontario +1 more

$4.00

Instant download

Grade 12 Science — Worksheet MCQ Paper for Mastering Molecular Geometry

Grade 12 Science — Worksheet MCQ Paper for Mastering Molecular Geometry

The Resource HubCreated byThe Resource Hub

Learning Objectives

  • Explain the principles of VSEPR theory and how it determines molecular shape.
  • Identify various molecular geometries based on electron pair repulsion models.
  • Analyze the relationship between molecular shape, bond angles, and polarity.
$3.00

Instant download

Linkage and Recombination Assessment for Grade 11 Science TEKS

Linkage and Recombination Assessment for Grade 11 Science TEKS

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Understand the concepts of linkage and recombination in genetics.
  • Explain how crossover frequency reflects physical distance between genes.
  • Identify factors like interference and hot spots that influence crossover distribution.
$5.00

Instant download

Grade 8 Social Studies | Watershed Systems  Coastal Interactions PDF  Answer Key

Grade 8 Social Studies | Watershed Systems Coastal Interactions PDF Answer Key

JCreated byJ.S Sheets

Learning Objectives

  • Understand the structure and significance of watershed systems and freshwater networks.
  • Identify how upstream activities impact water quality downstream.
  • Explore human reliance on waterways and how this reliance changes over time.
$3.00

Instant download

Grade 12 Science — Worksheet MCQ Paper for Mastering Population Dynamics

Grade 12 Science — Worksheet MCQ Paper for Mastering Population Dynamics

The Resource HubCreated byThe Resource Hub

Learning Objectives

  • Understand the key factors that influence changes in population size and structure.
  • Identify patterns of population growth, including exponential and logistic models.
  • Recognize different types of interactions within ecosystems and their effects on populations.
$3.00

Instant download

Model Limitations Assessment | General Grade 6 Science Standard

Model Limitations Assessment | General Grade 6 Science Standard

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Understand how models support explanations and guide uncertainty.
  • Recognize the importance of stating assumptions in models.
  • Explain how evidence is used to check and refine models.
$5.00

Instant download

Grade 6 Science | Cell Functions Worksheet (PDF) | NGSS Aligned

Grade 6 Science | Cell Functions Worksheet (PDF) | NGSS Aligned

Lumora LearningCreated byLumora Learning

Learning Objectives

  • Understand the structure and function of different cell organelles
  • Identify the roles of nucleus, mitochondria, ribosomes, and chloroplasts
  • Compare plant and animal cells to see how they are specialized
$5.00

Instant download

Grade 12 Science – Energy & Matter Flow in Ecosystems | Daily Reading Worksheet

Grade 12 Science – Energy & Matter Flow in Ecosystems | Daily Reading Worksheet

Bright Mind ResourcesCreated byBright Mind Resources

Learning Objectives

  • Understand how nutrients cycle through ecosystems among producers, consumers, and decomposers.
  • Explain the concept of energy flow in ecosystems and why it is unidirectional.
  • Recognize the role of food webs and trophic levels in energy transfer and biomass distribution.
$4.00

Instant download

Balancing Equations Assessment | BC Standards Grade 9 Science

Balancing Equations Assessment | BC Standards Grade 9 Science

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Understand the importance of balancing chemical equations to reflect atomic conservation.
  • Identify and write correctly balanced symbolic chemical equations with proper coefficients and state indicators.
  • Explain the role of stoichiometric coefficients in indicating molecule quantities and reaction relationships.
$5.00

Instant download

Grade 6 Social Studies | Daily Life Worksheet (Ontario Standards) (PDF)

Grade 6 Social Studies | Daily Life Worksheet (Ontario Standards) (PDF)

Sunny Desk ResourcesCreated bySunny Desk Resources

Learning Objectives

  • Describe how everyday routines in work, education, housing, and celebrations shape community life over time.
  • Explain causes of habitual change (technology and policy) and how those changes affect social roles and identity.
  • Compare continuity and change in cultural rituals and labor patterns across generations.

Grade 6Social Studies15 Pages

Also included in: Grade 6 Communities Through Time Social Studies Lesson Bundle for Ontario +1 more

$4.00

Instant download

Grade 11 Science | Molecular Genetics Worksheet (Answer Key) - NGSS-Aligned

Grade 11 Science | Molecular Genetics Worksheet (Answer Key) - NGSS-Aligned

Lumora LearningCreated byLumora Learning

Learning Objectives

  • Understand the relationship between DNA sequences and protein synthesis through replication, transcription, and translation.
  • Explain the structure of DNA and the genetic code.
  • Describe the process of gene expression regulation and how nucleotide sequences influence phenotypic traits.

Grade 11Science

$2.00

Instant download

Grade 11 Social Studies | Research Methods Worksheet (PDF + Rubric)

Grade 11 Social Studies | Research Methods Worksheet (PDF + Rubric)

JCreated byJ.S Sheets

Learning Objectives

  • Understand common qualitative and quantitative research methods used in social inquiry.
  • Identify purposes and limitations of interviews, surveys, observation, and ethnography.
  • Evaluate the significance of methodological choices on research findings and ethical outcomes.
$3.00

Instant download

Wave Properties Worksheet Grade 10 Science Activity | Waves & Energy

Wave Properties Worksheet Grade 10 Science Activity | Waves & Energy

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain how amplitude, wavelength, frequency, and wave speed describe repeating wave behavior
  • Relate frequency and wavelength for waves traveling at the same speed
  • Describe how reflection, refraction, and superposition affect what we observe

Grade 10Science32 Pages

Also included in: Grade 10 Physical Science Lesson Bundle | Florida NGSSS

$5.00

Instant download

Grade 11 Science — Seismic Profiles Worksheet MCQ Paper for Mastery

Grade 11 Science — Seismic Profiles Worksheet MCQ Paper for Mastery

The Resource HubCreated byThe Resource Hub

Learning Objectives

  • Understand how seismic profiles reveal Earth's internal structure.
  • Identify the differences between P-waves and S-waves and their significance.
  • Explain the concept of seismic shadow zones and their relation to Earth's outer core.
$3.00

Instant download

Sun–Earth–Moon Worksheet | Grade 6 Science Practice

Sun–Earth–Moon Worksheet | Grade 6 Science Practice

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain how the Sun, Earth, and Moon relative positions create Moon phases
  • Describe how eclipses happen when the Sun, Earth, and Moon align
  • Connect the Moon’s gravity to tides on Earth
$5.00

Instant download

Cellular Metabolism Assessment for Grade 9 Science | NGSS Aligned

Cellular Metabolism Assessment for Grade 9 Science | NGSS Aligned

Prism Point LearningCreated byPrism Point Learning

Learning Objectives

  • Explain the main biochemical pathways involved in cellular energy production, including glycolysis, the citric acid cycle, and electron transport chain.
  • Describe the role of ATP in energy coupling within cells and relate metabolic fluxes to organismal energy balance.
  • Analyze quantitative data related to reactants and products of metabolic pathways, such as oxygen consumption and ATP yield.

Grade 9Science

$5.00

Instant download

Grade 11 Social Studies | Cultural Diversity Worksheet (TEKS) (PDF)

Grade 11 Social Studies | Cultural Diversity Worksheet (TEKS) (PDF)

Sunny Desk ResourcesCreated bySunny Desk Resources

Learning Objectives

  • Explain how immigration patterns can create demographic shifts in a country.
  • Analyze how policy debates and initiatives influence multicultural understanding and social cohesion.
  • Evaluate how cultural diversity can shape ideas of national identity.

Grade 11Social Studies17 Pages

Also included in: Grade 11 20th-Century Social Change Social Studies Lesson Bundle for TEKS +1 more

$4.00

Instant download

Browse more categories

About Reading comprehension Worksheets

Find reading comprehension worksheets for class practice, homework, or self-study. All 40,284 are instant PDF downloads.

Each resource here is built by an independent educator and reviewed for quality. Worksheets print straight from PDF and suit classroom use, homework, or extra practice; most come with answer keys, and you can preview before purchasing.