99math

Fast math practice focuses on competition, reports
Bottom Line: This is a dependable -- if not very customizable -- way to get students some quick math practice, but the competition focus might not work for everyone.
CK-12

STEM and social studies resource with highly customizable content
Bottom Line: Making content accessible to kids with different learning styles, CK-12 could be the key to students understanding STEM topics.
Edulastic

Powerful standards-based assessment tool tracks student progress
Bottom Line: An efficient platform -- especially for test prep -- that helps teachers track student progress on standards mastery.
NRICH

Untangle robust math problems for all ages; plenty of teaching support
Bottom Line: It's an excellent classroom companion that can be implemented quickly with little adjustment and a high probability of success.
Khan Academy

Flexible learning environment offers goal-oriented personalized pathways
Bottom Line: A robust resource for targeted, individualized instruction in most standardized subject areas.
A+ Spelling Test

Spelling practice app meets expectations, doesn't exceed them
Bottom Line: An option worth considering for students needing to build their spelling skills at home or in the classroom.
Gizmos

Vast array of impressive, interactive science and math simulations
Bottom Line: This powerful and extensive set of math and science tools puts the learning in students' hands.
Knowt

Study aid uses AI to turn notes into short recall quizzes
Bottom Line: Students will find Knowt a useful tool for quick review and recall of well-organized information, and teachers will appreciate the quick turnaround from content to quiz.
Membean

Built-in differentiation powers effective vocabulary study tool
Bottom Line: A web-based vocabulary platform with potential to boost students' vocabulary knowledge and provide helpful data along the way.
Gooru

Track progress, differentiate instruction with vast content library
Bottom Line: Though it's not perfect, it's a great portal for supplementing classroom instruction and supporting personalized learning.
Brilliant

Challenge top students with self-guided math, science, and CS courses
Bottom Line: This learning and practice site can be an exciting challenge for passionate, independent students but may be too much for struggling kids.
Edia

Well-done worksheet generator helps reinforce learning
Bottom Line: This is a handy tool math teachers can use to reinforce learning with great feedback for students and teachers.
Citizen Math

Toughest palates can't resist appetizing look at real-world math
Bottom Line: Easy-to-deliver lessons use real-world topics tweens like.
Shmoop

Pop culture plus solid content equals legit learning
Bottom Line: Cleverly written content divided into digestible sections offers solid educational value.
StudySync

Superb ELA resource features engaging activities, stellar support
Bottom Line: An exceptional, ever-growing resource for helping your students become close readers, careful writers, and critical thinkers.
That Quiz

Simple design, customizable quizzes make test practice tolerable
Bottom Line: It's free, easy to use for both teachers and students, and, although basic, a pretty solid way to gather classroom data.
Virtual Nerd

Flip a classroom with these free video math tutorials
Bottom Line: High-quality but monotonous math tutorials can be a good classroom supplement.
Albert

Flexible, interactive test-prep practice for high school and beyond
Bottom Line: A variety of question types and on-the-spot analytics help teachers individualize test-prep practice.
Quizlet

Flexible study aid supports learning at home, at school, and on the go
Bottom Line: This is a quality study tool that helps students learn and memorize facts, especially with a paid subscription.
Microsoft Math Solver

Answer key and helpful videos for tricky homework questions
Bottom Line: Unlike other homework help apps, this tool attempts to surround answers with solutions to help students grow (with teacher support).
SAT Vocab by MindSnacks

Variety is key in charmingly effective SAT vocab app
Bottom Line: Upgrading to the full version gets you great games and a thorough word list for SAT vocab prep.
Seneca Learning

U.K.-based site offers research-driven approach to review
Bottom Line: This site has room to improve, but it's already a trustworthy option for test and exam review.
Studytracks

Notes are transformed into hip-hop beats in musical studying app
Bottom Line: Studytracks offers an engaging alternative to traditional and sometimes drab forms of studying.
HippoCampus

Multimedia lectures and simulations good for supplemental instruction
Bottom Line: This one-stop shop for free distance learning resources is a reliable place for enrichment or remediation.
Number2.com

Free, encouraging test-prep site makes practice more lively
Bottom Line: With friendly feedback that's rare in the test-prep world, this free site is comprehensive, responsive, and easy to use.
Synap

Study tool supports good habits, works best for older students
Bottom Line: A solid concept, but K–12 students and teachers might be better served by other free apps' features.