leveling and reinforcement tool assembly 90 is in the preferred embodiment a straight elongated rigid member row leveling and reinforcement tool assembly 90 is partially received by channels 32 52 72 35 55 and 75 of adjacent blocks 15 to facilitate the vertical and horizontal alignment of the rows row leveling and reinforcement tool assembly 90 also provide reinforcement to the wall structure by interlocking the adjacent blocks in a same row and the blocks in the adjacent rows row leveling and reinforcement tool assembly 90 has a substantially elongated rectangular shape with cooperative dimensions to be receivable by upper longitudinally aligned channels 32 52 and 72 as well as longitudinally aligned lower channels 35 55 and 75 of blocks 15 an alternate construction block system embodiment is referred to with numeral 100 and is represented in fig3 construction block system 100 includes base alignment tool assembly 180 with two guiding walls 186 and 188 and construction block 115 blocks 115 are installed in the base first row with base alignment tool 180 as best seen in fig4 and 4a block 115 has substantially the same shape and dimensions as block 15 with longitudinal walls 120 and 140 and transversal walls 130 150 and 170 defining internal cavities 160 between walls 130 and 150 and 162 between walls 150 and 170 block 115 has upper edges 121 and 141 for walls 120 and 140 respectively that terminate with upper slanted walls 122 and 142 also lower edges 123 and 143 for walls 120 and 140 respectively terminate with lower slanted walls 124 and 144 as best seen in fig4 a walls 120 and 140 also include side edges.