FIG. 1 is a perspective view of the inventive design for a modular rectangular classroom desk;

FIG. 2 is a top plan view of the design of FIG. 1 with the left and right back side doors in their closed positions;

FIG. 3 is a left side (relative to FIG. 1) elevational view of the design of FIG. 1;

FIG. 4 is a right side (relative to FIG. 1) elevational view of the design of FIG. 1;

FIG. 5 is a front side (relative to FIG. 1) elevational view of the design of FIG. 1 with the left and right back side doors in their closed positions;

FIG. 6 is a back side (relative to FIG. 1) elevational view of the design of FIG. 1 with the left and right back side doors in their closed positions;

FIG. 7 is a bottom plan view of the design of FIG. 1 with the left and right back side doors in their closed positions;

FIG. 8 is a view of the design of FIG. 1 similar to FIG. 2 but with the left and right back side doors in their open positions;

FIG. 9 is a view of the design of FIG. 1 similar to FIG. 3 but with the left and right back side doors in their open positions;

FIG. 10 is a view of the design of FIG. 1 similar to FIG. 4 but with the left and right back side doors in their open positions;

FIG. 11 is a view of the design of FIG. 1 similar to FIG. 5 but with the left and right back side doors in their open positions;

FIG. 12 is a view of the design of FIG. 1 similar to FIG. 6 but with the left and right side back side doors in their open positions; and,

FIG. 13 is a view of the design of FIG. 1 similar to FIG. 7 but with the left and right back side doors in their open positions.

The broken line showing of a computer monitor and keyboard is for illustrative purposes only and forms no part of the claimed design.