Try out different combinations of colored rods to explore a variety of math concepts from grades K-8. The system is based on the Cuisenaire® manipulatives of Hand2Mind. This born accessible math interactive has been developed as part of our participation in the NSF-sponsored Vital Prize Challenge.

Build particulate representations of reactions by combining atoms to form molecules or updating the chemical equation. Model the reaction, predict the product, or balance the equation – with Reactions, the symbolic is tied to the particulate to aid in representational competency and visualizing chemical reactions.

Create 2D molecular drawings with ease. Connect atoms and add carbon chains to make bond line drawings complete with stereochemistry capabilities, charges, and the ability to show or hide implicit hydrogens. Fully accessible keyboard controls allow everyone to draw structures and access automatically generated alt text descriptions of the molecules.

Write chemical equations with ease using the periodic table keyboard, the provided applicable elements, or type in with the computer keyboard. Can be used for balancing equations, writing half reactions, predicting the product, and more, all while receiving targeted feedback.

Build Lewis structures by attaching atoms with bonds and adding lone pairs. Track the formal charge and the number of electrons contributing to the octet of the atom. Fully screen reader-compatible and accessible with the keyboard control panel and auto-generated alt text descriptions.

Dynamically explore mechanisms by drawing arrows then clicking “Push” to watch as electrons flow to break and make new bonds. The molecules are presented in 3D to allow for observation of changes in geometry as the reaction occurs. Each step is assessed to provide real-time formative feedback.

Observe electron and molecular geometries in 3D as you add lone pairs of electrons and bonding groups to a generic central atom. Instantly receive additional information about geometries and bond angles through the Model Data box as you build. Fully screen reader compatible and accessible with the ability to build using keyboard controls and receive audio descriptions of the model in real time.

Build models of hybrid and atomic orbitals of a central atom and the adjacent atoms bonded to it within a molecule. Simply drag the s and p orbitals you want to combine then click HYBRIDIZE to form hybrid orbitals, and add in any remaining atomic orbitals. Rotating the entire molecule or a single atom aids in visualization of geometries and rotation of bonds.

Integrated with molecular modeling smarts, Modeler can be used to build and view molecules in 3D to explore geometries and various conformations. Rotate single bonds or the entire molecule, or build two molecules at the same time and superimpose them. Learn how to use Modeler here.

Our web-based tools deliver immediate feedback to students as they explore content, gaining deeper connections for long-lasting learning. Check back here for new interactives in the future.