GT Extensions for Math Investigations: Grade 2 – 3rd 9 Weeks
GT extensions overlap with the regular extensions; however, these extensions address
components of the GT Curriculum Scope and Sequence. These extensions are designed
for gifted math students are as a means to extend lessons conceptually, through depth and
complexity of process, or by providing a “ripple” effect that addresses the learning
objectives and provides a preview of new skills. Additionally, some activities have been
introduced that may substitute for an investigation if a pre-assessment such as preview
data from the beginning of the year deems mastery of objectives in the investigation. The
same objectives are addressed, however, the substitute activity is differentiated. Please
consider time factors when using these extensions, particularly substitute activities, so
that pacing is appropriately aligned with the pacing of investigations.
Putting Together and Taking Apart
Investigation 3
Finding the Missing Part
 Students show more than one way to solve a
combining problem using progressively more
complex number sets
 Students show more than one way to solve a
separating problem using progressively more
complex number sets
 Students write short stories for combining and
separating situations that have more than one
step using progressively more complex number
sets (example: 5 + 8 + 22, 16 – 4 + 5)
 Students use colored pencils to mark patterns they
discover on the hundreds chart
 Students create a legend for patterns on the
hundreds chart. Students explain and reflect on
their findings in writing.
 Partnered students use a number cubes to
generate appropriate sized numbers to use to
write math problems to solve.
 Students create their own two-step problems
using progressively more complex number sets.
Investigation 5
Addition and Subtraction Strategies
 Students work in small groups to challenge one
another to determine the most ways to make
100.
Investigation 1
Combining and Separating
Investigation 2
Working with 100