Ms. Machiela

Biology teacher and Science Dept Chair at SMHS

[San Marcos High School @SMHS_SMCISD]

Science in action! Students in Mrs. Machiela & Mr. Rodriguez’s Environmental Systems class, alongside Merced, a resident teacher from TX State, explored owl pellet dissections to study food webs, energy transfer, & biomass at each trophic level. #RattlerPride #LearningInAction

[San Marcos High School @SMHS_SMCISD]

Huge thanks to our Biology team for creating a new Short Constructed Response (SCR) rubric! A great step in supporting clear expectations and student success.

#RattlerPride #LearningInAction

[San Marcos CISD @SanMarcosCISD]

Congrats to our 2025 District Teachers of the Year! Mr. Pacheco (Rodriguez Elementary) and Ms. Machiela (SMHS) were honored today at the ESC Region 13 Teacher of the Year Celebration! #RattlerUp

[Ms. Machiela @SMHSBio]

Although Taxonomy and Classification was moved to the MS TEKS, we still have a duty to teach our kids as we transition! 🔊 Volume up to listen to these awesome conversations as students sorted cups with kingdom characteristics as a pre-assessment activity 🤓

[Ms. Machiela @SMHSBio]

Cookie Mining for Environmental Systems to demonstrate costs, profits, and environmental impact effects

[Ms. Machiela @SMHSBio]

Here is a water pollution clean up lab my TXST Resident (Ms.Regan) created for Environmental Systems. She even created money with her face on it 😂

[Ms. Machiela @SMHSBio]

Was truly awful at updating this app on classroom shenanigans so here we have Quizlet live for practicing vocab terms in a group setting and one video for a natural selection lab with sand and beans. 😀

[Ms. Machiela @SMHSBio]

2 more animal tanks to move out tomorrow and with that my era in Room 200 will have ended. Come visit me in Room 505 next year 😁 💜

[San Marcos CISD @SanMarcosCISD]

Happy #TeacherAppreciationWeek! Let's celebrate all the amazing educators who inspire, guide, and empower our #SMCISD students daily. A special shoutout to our District Teachers of the Year—congratulations to Ms. Machiela from SMHS and Mr. Pacheco from Rodriguez Elementary!

[Ms. Machiela @SMHSBio]

Today our @TXST resident, Ms. Regan, treated our preap bio students to picture book story time using “Cells: An Owner’s Handbook”. This was our intro to cell theory and cell type 📚 Transported back to elementary 👩🏼‍🏫 @SMHS_SMCISD

[Ms. Machiela @SMHSBio]

8th year here I come! #ALLINRattlers

[Ms. Machiela @SMHSBio]

Just a reminder that Biology EOC tutorials start tomorrow morning!! Come review with us @SMHS_SMCISD 🥼

[San Marcos CISD @SanMarcosCISD]

Ms. Wolter’s aquatic science classes made a splash on their first day back with a hands-on lesson that took place in the San Marcos River! Thank you to TXST’s Aquatic Biology program for providing an exciting learning experience for our students #RattlerUp

[Ms. Machiela @SMHSBio]

My book of spring break was shattering and beautifully written

[Science Is Fun @sciencefunn]

Everyone: “caffeine gives me energy to get through the day!”

ATP:

[Ms. Machiela @SMHSBio]

21 DNA models have been displayed in the @SMHS_LRC. The models of your favorite macromolecule, deoxyribonucleic acid, were hand made by Pre-AP Biology students!

[Ms. Machiela @SMHSBio]

Environmental ran an Ozone modeling lab. In this lab we had trials of natural cycling (ozone to oxygen and back) and trials with CFCs added. Students created graphs to analyze the increased depletion of the ozone due to CFCs. Below is an ozone maker, a UV destroyer, and a CFC.

[Ms. Machiela @SMHSBio]

Environmental systems did a lab today to investigate the amount of oxygen in the atmosphere. Students were able to calculate the % of oxygen in the air and compare it to the actual percentage. The smallest % error seen today was 4.8% !

[Ms. Machiela @SMHSBio]

These zombie survival posters for different biomes are coming together 🏃‍♀️ 🧟‍♀️

[Ms. Machiela @SMHSBio]

Ever thought about what you’d do in a zombie apocalypse?? 🧟‍♀️ 🧟‍♂️ today we did started research for camp setups in different biomes. Stay tuned for our student’s apocalyptic camps 👀 @SMHS_SMCISD