THREE DIMENSION SCIENCE

Phenomena students
figure out — not memorize

NGSS phenomenon-based assessments, sensemaking tasks, and bell ringers for grades 6–8. Built by a 24-year veteran science teacher. Aligned to OpenSciEd. Three-dimensional from the first question.

DCI SEP CCC
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88%
student proficient
on state NGSS
24
years teaching
middle school science
18
OpenSciEd units
covered, grades 6–8
3D
SEP + DCI + CCC
in every product
What's Inside

Every product is built around a real phenomenon

Three product tiers for every OpenSciEd unit. Each one tested in real middle school classrooms before it lists.

1

Phenomenon Do-Nows

Three-question bell ringers that hook students into a unit's anchor phenomenon. Print and go, with answer key. Free for every OpenSciEd unit.

FREE All 18 units
2

Mid-Unit Assessments

Mid-investigation formative checks with embedded graphs, novel-context questions, modeling tasks, and a full teacher key with common misconceptions.

~$3.50 each
3

End-of-Unit Assessments

Transfer phenomenon assessments. Students apply unit understanding to a new context with multiple choice, free response, and a 12-point modeling task.

~$4.50 each
Our Philosophy

Three rules. Every product.

If a question can be answered without thinking about the phenomenon, it doesn't belong in our products.

1

Phenomenon-First Design

Every assessment opens with a real-world image and a specific question students can't answer from recall. The phenomenon comes first. The standards come naturally.

2

Three-Dimensional Questioning

SEP, DCI, and CCC in every assessment — not just listed in the standards. Questions are color-coded so teachers can see exactly which dimension each item targets.

3

Teacher Keys That Help

Full rubrics with point allocations. Common student misconceptions mapped to specific questions. "Look for" lists for free response items. Built so a substitute could grade them.

About the Teacher

Built by a teacher. Tested on real students.

I'm David Rosvally, a 7th grade science teacher at Weston Middle School in Connecticut. I've been teaching middle school science for 24 years, presenting at NSTA conferences on inquiry-based instruction, and training teachers on NGSS-aligned assessment and OpenSciEd implementation. I'm a TEAM CT certified mentor and an alumnus of the Exploratorium's Institute for Inquiry. My students score 88% proficient and above on the NGSS 8th grade state assessment.

Every product in this store has been tested in real middle school classrooms — mine — before it goes live. If it doesn't work with my own students, it doesn't get listed.

Get Started

Free Do-Nows for every OpenSciEd unit.

Start with any one of our free phenomenon-based bell ringers. If they work for your students, the full assessment series is waiting on TPT.